$OpenBSD: patch-src_tools_trackgen_CMakeLists_txt,v 1.3 2016/09/20 18:18:52 pascal Exp $
--- src/tools/trackgen/CMakeLists.txt.orig	Mon Apr 18 17:37:07 2016
+++ src/tools/trackgen/CMakeLists.txt	Tue Sep 20 01:28:42 2016
@@ -60,6 +60,7 @@ ENDIF(MINGW)
 
 IF(UNIX)
     SD_INSTALL_FILES(MAN man6 PREFIX ${SOURCE_DIR}/doc/man FILES ${_TARGET_NAME}.6)
+    INCLUDE_DIRECTORIES(${X11_INCLUDE_DIR})
 ENDIF(UNIX)
 
 SD_INSTALL_FILES(BIN TARGETS ${_TARGET_NAME})
